One of the inspirations of building Interseller was to create a tool that combines functions of multiple tools in an easy to use manner at an affordable price.
A major difference between interseller.io and prospect.io is pricing. Prospect.io has variable pricing using a credit system. 1 credit allows you to email a prospect directly from drip campaigns, find at least 1 email address on a prospect's website or on a professional network profile, and verify an email address.
For $100 a month using Interseller you'll get unlimited email verifactions, email sequences, and 250 email lookups. Our sequences feature allows you to schedule emails to be sent to a prospect on a pre-determined schedule.
Prospecting

Find emails on social profiles
Company enrichment
Unlimited email verifactions
Outreach
Connect your email account
Mail merge
Open and click tracking
Buffer time between emails
Unsubscribe links
Calendar tracking
A/B testing
Sync
Sync contacts to CRM
Sync activity
Pricing
250 contacts in a 3 step sequence
**As of April 2018